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| 1 /* | |
| 2 * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * | |
| 8 * 1. Redistributions of source code must retain the above | |
| 9 * copyright notice, this list of conditions and the following | |
| 10 * disclaimer. | |
| 11 * 2. Redistributions in binary form must reproduce the above | |
| 12 * copyright notice, this list of conditions and the following | |
| 13 * disclaimer in the documentation and/or other materials | |
| 14 * provided with the distribution. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
| 19 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
| 20 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
| 21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
| 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 27 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 28 */ | |
| 29 | |
| 30 #ifndef PolygonShape_h | |
| 31 #define PolygonShape_h | |
| 32 | |
| 33 #include "core/rendering/shapes/Shape.h" | |
| 34 #include "core/rendering/shapes/ShapeInterval.h" | |
| 35 #include "platform/geometry/FloatPolygon.h" | |
| 36 | |
| 37 namespace blink { | |
| 38 | |
| 39 class OffsetPolygonEdge final : public VertexPair { | |
| 40 public: | |
| 41 OffsetPolygonEdge(const FloatPolygonEdge& edge, const FloatSize& offset) | |
| 42 : m_vertex1(edge.vertex1() + offset) | |
| 43 , m_vertex2(edge.vertex2() + offset) | |
| 44 { | |
| 45 } | |
| 46 | |
| 47 virtual const FloatPoint& vertex1() const override { return m_vertex1; } | |
| 48 virtual const FloatPoint& vertex2() const override { return m_vertex2; } | |
| 49 | |
| 50 bool isWithinYRange(float y1, float y2) const { return y1 <= minY() && y2 >=
maxY(); } | |
| 51 bool overlapsYRange(float y1, float y2) const { return y2 >= minY() && y1 <=
maxY(); } | |
| 52 float xIntercept(float y) const; | |
| 53 FloatShapeInterval clippedEdgeXRange(float y1, float y2) const; | |
| 54 | |
| 55 private: | |
| 56 FloatPoint m_vertex1; | |
| 57 FloatPoint m_vertex2; | |
| 58 }; | |
| 59 | |
| 60 class PolygonShape final : public Shape { | |
| 61 WTF_MAKE_NONCOPYABLE(PolygonShape); | |
| 62 public: | |
| 63 PolygonShape(PassOwnPtr<Vector<FloatPoint> > vertices, WindRule fillRule) | |
| 64 : Shape() | |
| 65 , m_polygon(vertices, fillRule) | |
| 66 { | |
| 67 } | |
| 68 | |
| 69 virtual LayoutRect shapeMarginLogicalBoundingBox() const override; | |
| 70 virtual bool isEmpty() const override { return m_polygon.isEmpty(); } | |
| 71 virtual LineSegment getExcludedInterval(LayoutUnit logicalTop, LayoutUnit lo
gicalHeight) const override; | |
| 72 virtual void buildDisplayPaths(DisplayPaths&) const override; | |
| 73 | |
| 74 private: | |
| 75 FloatPolygon m_polygon; | |
| 76 }; | |
| 77 | |
| 78 } // namespace blink | |
| 79 | |
| 80 #endif // PolygonShape_h | |
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